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A block of mass m moves on a horizontal ...

A block of mass `m` moves on a horizontal rough surface with initial velocity `v`. The height of the centre of mass of the block is `h` from the surface. Consider a point `A` on the surface.

A

angular momentum about `A` is `mvh` initially

B

the velocity of the block decreases at time passes.

C

torque of the forces acting on block is zero about `A`

D

angular momentum is not conserved about `A`.

Text Solution

Verified by Experts

The correct Answer is:
A, B, D

(A) Angular momentum about `A` is `mvh` initially
(B) Due to friction velocity of block decrease with time
( C) Since angular momentum about `A` decreases so torque of forces is not zero about `A`
(D) Angular momentum is not conserved about `A`.
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